/* ======================================================================== */
/* ========================= LICENSING & COPYRIGHT ======================== */
/* ======================================================================== */
/*
 *                                  MUSASHI
 *                                Version 4.60
 *
 * A portable Motorola M680x0 processor emulation engine.
 * Copyright Karl Stenerud.  All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */


/* ======================================================================== */
/* ================================= NOTES ================================ */
/* ======================================================================== */



/* ======================================================================== */
/* ================================ INCLUDES ============================== */
/* ======================================================================== */

extern void m68040_fpu_op0(void);
extern void m68040_fpu_op1(void);
extern void m68881_mmu_ops(void);
extern unsigned char m68ki_cycles[][0x10000];
extern void (*m68ki_instruction_jump_table[0x10000])(void); /* opcode handler jump table */
extern void m68ki_build_opcode_table(void);

#include "m68kops.h"
#include "m68kcpu.h"

#include "m68kfpu.c"
#include "m68kmmu.h" // uses some functions from m68kfpu.c which are static !

/* ======================================================================== */
/* ================================= DATA ================================= */
/* ======================================================================== */

int  m68ki_initial_cycles;
int  m68ki_remaining_cycles = 0;                     /* Number of clocks remaining */
uint m68ki_tracing = 0;
uint m68ki_address_space;

#ifdef M68K_LOG_ENABLE
const char *const m68ki_cpu_names[] =
{
    "Invalid CPU",
    "M68000",
    "M68010",
    "M68EC020",
    "M68020",
    "M68EC030",
    "M68030",
    "M68EC040",
    "M68LC040",
    "M68040",
    "SCC68070",
};
#endif /* M68K_LOG_ENABLE */

/* The CPU core */
m68ki_cpu_core m68ki_cpu = {0};

#if M68K_EMULATE_ADDRESS_ERROR
#ifdef _BSD_SETJMP_H
sigjmp_buf m68ki_aerr_trap;
#else
jmp_buf m68ki_aerr_trap;
#endif
#endif /* M68K_EMULATE_ADDRESS_ERROR */

uint    m68ki_aerr_address;
uint    m68ki_aerr_write_mode;
uint    m68ki_aerr_fc;

jmp_buf m68ki_bus_error_jmp_buf;

/* Used by shift & rotate instructions */
const uint8 m68ki_shift_8_table[65] =
{
    0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff, 0xff
};
const uint16 m68ki_shift_16_table[65] =
{
    0x0000, 0x8000, 0xc000, 0xe000, 0xf000, 0xf800, 0xfc00, 0xfe00, 0xff00,
    0xff80, 0xffc0, 0xffe0, 0xfff0, 0xfff8, 0xfffc, 0xfffe, 0xffff, 0xffff,
    0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
    0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
    0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
    0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
    0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
    0xffff, 0xffff
};
const uint m68ki_shift_32_table[65] =
{
    0x00000000, 0x80000000, 0xc0000000, 0xe0000000, 0xf0000000, 0xf8000000,
    0xfc000000, 0xfe000000, 0xff000000, 0xff800000, 0xffc00000, 0xffe00000,
    0xfff00000, 0xfff80000, 0xfffc0000, 0xfffe0000, 0xffff0000, 0xffff8000,
    0xffffc000, 0xffffe000, 0xfffff000, 0xfffff800, 0xfffffc00, 0xfffffe00,
    0xffffff00, 0xffffff80, 0xffffffc0, 0xffffffe0, 0xfffffff0, 0xfffffff8,
    0xfffffffc, 0xfffffffe, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
    0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
    0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
    0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
    0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
    0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff
};


/* Number of clock cycles to use for exception processing.
 * I used 4 for any vectors that are undocumented for processing times.
 */
const uint8 m68ki_exception_cycle_table[5][256] =
{
    { /* 000 */
         40, /*  0: Reset - Initial Stack Pointer                      */
          4, /*  1: Reset - Initial Program Counter                    */
         50, /*  2: Bus Error                             (unemulated) */
         50, /*  3: Address Error                         (unemulated) */
         34, /*  4: Illegal Instruction                                */
         38, /*  5: Divide by Zero                                     */
         40, /*  6: CHK                                                */
         34, /*  7: TRAPV                                              */
         34, /*  8: Privilege Violation                                */
         34, /*  9: Trace                                              */
         34, /* 10: 1010                                               */
         34, /* 11: 1111                                               */
          4, /* 12: RESERVED                                           */
          4, /* 13: Coprocessor Protocol Violation        (unemulated) */
          4, /* 14: Format Error                                       */
         44, /* 15: Uninitialized Interrupt                            */
          4, /* 16: RESERVED                                           */
          4, /* 17: RESERVED                                           */
          4, /* 18: RESERVED                                           */
          4, /* 19: RESERVED                                           */
          4, /* 20: RESERVED                                           */
          4, /* 21: RESERVED                                           */
          4, /* 22: RESERVED                                           */
          4, /* 23: RESERVED                                           */
         44, /* 24: Spurious Interrupt                                 */
         44, /* 25: Level 1 Interrupt Autovector                       */
         44, /* 26: Level 2 Interrupt Autovector                       */
         44, /* 27: Level 3 Interrupt Autovector                       */
         44, /* 28: Level 4 Interrupt Autovector                       */
         44, /* 29: Level 5 Interrupt Autovector                       */
         44, /* 30: Level 6 Interrupt Autovector                       */
         44, /* 31: Level 7 Interrupt Autovector                       */
         34, /* 32: TRAP #0                                            */
         34, /* 33: TRAP #1                                            */
         34, /* 34: TRAP #2                                            */
         34, /* 35: TRAP #3                                            */
         34, /* 36: TRAP #4                                            */
         34, /* 37: TRAP #5                                            */
         34, /* 38: TRAP #6                                            */
         34, /* 39: TRAP #7                                            */
         34, /* 40: TRAP #8                                            */
         34, /* 41: TRAP #9                                            */
         34, /* 42: TRAP #10                                           */
         34, /* 43: TRAP #11                                           */
         34, /* 44: TRAP #12                                           */
         34, /* 45: TRAP #13                                           */
         34, /* 46: TRAP #14                                           */
         34, /* 47: TRAP #15                                           */
          4, /* 48: FP Branch or Set on Unknown Condition (unemulated) */
          4, /* 49: FP Inexact Result                     (unemulated) */
          4, /* 50: FP Divide by Zero                     (unemulated) */
          4, /* 51: FP Underflow                          (unemulated) */
          4, /* 52: FP Operand Error                      (unemulated) */
          4, /* 53: FP Overflow                           (unemulated) */
          4, /* 54: FP Signaling NAN                      (unemulated) */
          4, /* 55: FP Unimplemented Data Type            (unemulated) */
          4, /* 56: MMU Configuration Error               (unemulated) */
          4, /* 57: MMU Illegal Operation Error           (unemulated) */
          4, /* 58: MMU Access Level Violation Error      (unemulated) */
          4, /* 59: RESERVED                                           */
          4, /* 60: RESERVED                                           */
          4, /* 61: RESERVED                                           */
          4, /* 62: RESERVED                                           */
          4, /* 63: RESERVED                                           */
             /* 64-255: User Defined                                   */
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4
    },
    { /* 010 */
         40, /*  0: Reset - Initial Stack Pointer                      */
          4, /*  1: Reset - Initial Program Counter                    */
        126, /*  2: Bus Error                             (unemulated) */
        126, /*  3: Address Error                         (unemulated) */
         38, /*  4: Illegal Instruction                                */
         44, /*  5: Divide by Zero                                     */
         44, /*  6: CHK                                                */
         34, /*  7: TRAPV                                              */
         38, /*  8: Privilege Violation                                */
         38, /*  9: Trace                                              */
          4, /* 10: 1010                                               */
          4, /* 11: 1111                                               */
          4, /* 12: RESERVED                                           */
          4, /* 13: Coprocessor Protocol Violation        (unemulated) */
          4, /* 14: Format Error                                       */
         44, /* 15: Uninitialized Interrupt                            */
          4, /* 16: RESERVED                                           */
          4, /* 17: RESERVED                                           */
          4, /* 18: RESERVED                                           */
          4, /* 19: RESERVED                                           */
          4, /* 20: RESERVED                                           */
          4, /* 21: RESERVED                                           */
          4, /* 22: RESERVED                                           */
          4, /* 23: RESERVED                                           */
         46, /* 24: Spurious Interrupt                                 */
         46, /* 25: Level 1 Interrupt Autovector                       */
         46, /* 26: Level 2 Interrupt Autovector                       */
         46, /* 27: Level 3 Interrupt Autovector                       */
         46, /* 28: Level 4 Interrupt Autovector                       */
         46, /* 29: Level 5 Interrupt Autovector                       */
         46, /* 30: Level 6 Interrupt Autovector                       */
         46, /* 31: Level 7 Interrupt Autovector                       */
         38, /* 32: TRAP #0                                            */
         38, /* 33: TRAP #1                                            */
         38, /* 34: TRAP #2                                            */
         38, /* 35: TRAP #3                                            */
         38, /* 36: TRAP #4                                            */
         38, /* 37: TRAP #5                                            */
         38, /* 38: TRAP #6                                            */
         38, /* 39: TRAP #7                                            */
         38, /* 40: TRAP #8                                            */
         38, /* 41: TRAP #9                                            */
         38, /* 42: TRAP #10                                           */
         38, /* 43: TRAP #11                                           */
         38, /* 44: TRAP #12                                           */
         38, /* 45: TRAP #13                                           */
         38, /* 46: TRAP #14                                           */
         38, /* 47: TRAP #15                                           */
          4, /* 48: FP Branch or Set on Unknown Condition (unemulated) */
          4, /* 49: FP Inexact Result                     (unemulated) */
          4, /* 50: FP Divide by Zero                     (unemulated) */
          4, /* 51: FP Underflow                          (unemulated) */
          4, /* 52: FP Operand Error                      (unemulated) */
          4, /* 53: FP Overflow                           (unemulated) */
          4, /* 54: FP Signaling NAN                      (unemulated) */
          4, /* 55: FP Unimplemented Data Type            (unemulated) */
          4, /* 56: MMU Configuration Error               (unemulated) */
          4, /* 57: MMU Illegal Operation Error           (unemulated) */
          4, /* 58: MMU Access Level Violation Error      (unemulated) */
          4, /* 59: RESERVED                                           */
          4, /* 60: RESERVED                                           */
          4, /* 61: RESERVED                                           */
          4, /* 62: RESERVED                                           */
          4, /* 63: RESERVED                                           */
             /* 64-255: User Defined                                   */
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4
    },
    { /* 020 */
          4, /*  0: Reset - Initial Stack Pointer                      */
          4, /*  1: Reset - Initial Program Counter                    */
         50, /*  2: Bus Error                             (unemulated) */
         50, /*  3: Address Error                         (unemulated) */
         20, /*  4: Illegal Instruction                                */
         38, /*  5: Divide by Zero                                     */
         40, /*  6: CHK                                                */
         20, /*  7: TRAPV                                              */
         34, /*  8: Privilege Violation                                */
         25, /*  9: Trace                                              */
         20, /* 10: 1010                                               */
         20, /* 11: 1111                                               */
          4, /* 12: RESERVED                                           */
          4, /* 13: Coprocessor Protocol Violation        (unemulated) */
          4, /* 14: Format Error                                       */
         30, /* 15: Uninitialized Interrupt                            */
          4, /* 16: RESERVED                                           */
          4, /* 17: RESERVED                                           */
          4, /* 18: RESERVED                                           */
          4, /* 19: RESERVED                                           */
          4, /* 20: RESERVED                                           */
          4, /* 21: RESERVED                                           */
          4, /* 22: RESERVED                                           */
          4, /* 23: RESERVED                                           */
         30, /* 24: Spurious Interrupt                                 */
         30, /* 25: Level 1 Interrupt Autovector                       */
         30, /* 26: Level 2 Interrupt Autovector                       */
         30, /* 27: Level 3 Interrupt Autovector                       */
         30, /* 28: Level 4 Interrupt Autovector                       */
         30, /* 29: Level 5 Interrupt Autovector                       */
         30, /* 30: Level 6 Interrupt Autovector                       */
         30, /* 31: Level 7 Interrupt Autovector                       */
         20, /* 32: TRAP #0                                            */
         20, /* 33: TRAP #1                                            */
         20, /* 34: TRAP #2                                            */
         20, /* 35: TRAP #3                                            */
         20, /* 36: TRAP #4                                            */
         20, /* 37: TRAP #5                                            */
         20, /* 38: TRAP #6                                            */
         20, /* 39: TRAP #7                                            */
         20, /* 40: TRAP #8                                            */
         20, /* 41: TRAP #9                                            */
         20, /* 42: TRAP #10                                           */
         20, /* 43: TRAP #11                                           */
         20, /* 44: TRAP #12                                           */
         20, /* 45: TRAP #13                                           */
         20, /* 46: TRAP #14                                           */
         20, /* 47: TRAP #15                                           */
          4, /* 48: FP Branch or Set on Unknown Condition (unemulated) */
          4, /* 49: FP Inexact Result                     (unemulated) */
          4, /* 50: FP Divide by Zero                     (unemulated) */
          4, /* 51: FP Underflow                          (unemulated) */
          4, /* 52: FP Operand Error                      (unemulated) */
          4, /* 53: FP Overflow                           (unemulated) */
          4, /* 54: FP Signaling NAN                      (unemulated) */
          4, /* 55: FP Unimplemented Data Type            (unemulated) */
          4, /* 56: MMU Configuration Error               (unemulated) */
          4, /* 57: MMU Illegal Operation Error           (unemulated) */
          4, /* 58: MMU Access Level Violation Error      (unemulated) */
          4, /* 59: RESERVED                                           */
          4, /* 60: RESERVED                                           */
          4, /* 61: RESERVED                                           */
          4, /* 62: RESERVED                                           */
          4, /* 63: RESERVED                                           */
             /* 64-255: User Defined                                   */
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4
    },
    { /* 030 - not correct */
          4, /*  0: Reset - Initial Stack Pointer                      */
          4, /*  1: Reset - Initial Program Counter                    */
         50, /*  2: Bus Error                             (unemulated) */
         50, /*  3: Address Error                         (unemulated) */
         20, /*  4: Illegal Instruction                                */
         38, /*  5: Divide by Zero                                     */
         40, /*  6: CHK                                                */
         20, /*  7: TRAPV                                              */
         34, /*  8: Privilege Violation                                */
         25, /*  9: Trace                                              */
         20, /* 10: 1010                                               */
         20, /* 11: 1111                                               */
          4, /* 12: RESERVED                                           */
          4, /* 13: Coprocessor Protocol Violation        (unemulated) */
          4, /* 14: Format Error                                       */
         30, /* 15: Uninitialized Interrupt                            */
          4, /* 16: RESERVED                                           */
          4, /* 17: RESERVED                                           */
          4, /* 18: RESERVED                                           */
          4, /* 19: RESERVED                                           */
          4, /* 20: RESERVED                                           */
          4, /* 21: RESERVED                                           */
          4, /* 22: RESERVED                                           */
          4, /* 23: RESERVED                                           */
         30, /* 24: Spurious Interrupt                                 */
         30, /* 25: Level 1 Interrupt Autovector                       */
         30, /* 26: Level 2 Interrupt Autovector                       */
         30, /* 27: Level 3 Interrupt Autovector                       */
         30, /* 28: Level 4 Interrupt Autovector                       */
         30, /* 29: Level 5 Interrupt Autovector                       */
         30, /* 30: Level 6 Interrupt Autovector                       */
         30, /* 31: Level 7 Interrupt Autovector                       */
         20, /* 32: TRAP #0                                            */
         20, /* 33: TRAP #1                                            */
         20, /* 34: TRAP #2                                            */
         20, /* 35: TRAP #3                                            */
         20, /* 36: TRAP #4                                            */
         20, /* 37: TRAP #5                                            */
         20, /* 38: TRAP #6                                            */
         20, /* 39: TRAP #7                                            */
         20, /* 40: TRAP #8                                            */
         20, /* 41: TRAP #9                                            */
         20, /* 42: TRAP #10                                           */
         20, /* 43: TRAP #11                                           */
         20, /* 44: TRAP #12                                           */
         20, /* 45: TRAP #13                                           */
         20, /* 46: TRAP #14                                           */
         20, /* 47: TRAP #15                                           */
          4, /* 48: FP Branch or Set on Unknown Condition (unemulated) */
          4, /* 49: FP Inexact Result                     (unemulated) */
          4, /* 50: FP Divide by Zero                     (unemulated) */
          4, /* 51: FP Underflow                          (unemulated) */
          4, /* 52: FP Operand Error                      (unemulated) */
          4, /* 53: FP Overflow                           (unemulated) */
          4, /* 54: FP Signaling NAN                      (unemulated) */
          4, /* 55: FP Unimplemented Data Type            (unemulated) */
          4, /* 56: MMU Configuration Error               (unemulated) */
          4, /* 57: MMU Illegal Operation Error           (unemulated) */
          4, /* 58: MMU Access Level Violation Error      (unemulated) */
          4, /* 59: RESERVED                                           */
          4, /* 60: RESERVED                                           */
          4, /* 61: RESERVED                                           */
          4, /* 62: RESERVED                                           */
          4, /* 63: RESERVED                                           */
             /* 64-255: User Defined                                   */
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4
    },
    { /* 040 */ // TODO: these values are not correct
          4, /*  0: Reset - Initial Stack Pointer                      */
          4, /*  1: Reset - Initial Program Counter                    */
         50, /*  2: Bus Error                             (unemulated) */
         50, /*  3: Address Error                         (unemulated) */
         20, /*  4: Illegal Instruction                                */
         38, /*  5: Divide by Zero                                     */
         40, /*  6: CHK                                                */
         20, /*  7: TRAPV                                              */
         34, /*  8: Privilege Violation                                */
         25, /*  9: Trace                                              */
         20, /* 10: 1010                                               */
         20, /* 11: 1111                                               */
          4, /* 12: RESERVED                                           */
          4, /* 13: Coprocessor Protocol Violation        (unemulated) */
          4, /* 14: Format Error                                       */
         30, /* 15: Uninitialized Interrupt                            */
          4, /* 16: RESERVED                                           */
          4, /* 17: RESERVED                                           */
          4, /* 18: RESERVED                                           */
          4, /* 19: RESERVED                                           */
          4, /* 20: RESERVED                                           */
          4, /* 21: RESERVED                                           */
          4, /* 22: RESERVED                                           */
          4, /* 23: RESERVED                                           */
         30, /* 24: Spurious Interrupt                                 */
         30, /* 25: Level 1 Interrupt Autovector                       */
         30, /* 26: Level 2 Interrupt Autovector                       */
         30, /* 27: Level 3 Interrupt Autovector                       */
         30, /* 28: Level 4 Interrupt Autovector                       */
         30, /* 29: Level 5 Interrupt Autovector                       */
         30, /* 30: Level 6 Interrupt Autovector                       */
         30, /* 31: Level 7 Interrupt Autovector                       */
         20, /* 32: TRAP #0                                            */
         20, /* 33: TRAP #1                                            */
         20, /* 34: TRAP #2                                            */
         20, /* 35: TRAP #3                                            */
         20, /* 36: TRAP #4                                            */
         20, /* 37: TRAP #5                                            */
         20, /* 38: TRAP #6                                            */
         20, /* 39: TRAP #7                                            */
         20, /* 40: TRAP #8                                            */
         20, /* 41: TRAP #9                                            */
         20, /* 42: TRAP #10                                           */
         20, /* 43: TRAP #11                                           */
         20, /* 44: TRAP #12                                           */
         20, /* 45: TRAP #13                                           */
         20, /* 46: TRAP #14                                           */
         20, /* 47: TRAP #15                                           */
          4, /* 48: FP Branch or Set on Unknown Condition (unemulated) */
          4, /* 49: FP Inexact Result                     (unemulated) */
          4, /* 50: FP Divide by Zero                     (unemulated) */
          4, /* 51: FP Underflow                          (unemulated) */
          4, /* 52: FP Operand Error                      (unemulated) */
          4, /* 53: FP Overflow                           (unemulated) */
          4, /* 54: FP Signaling NAN                      (unemulated) */
          4, /* 55: FP Unimplemented Data Type            (unemulated) */
          4, /* 56: MMU Configuration Error               (unemulated) */
          4, /* 57: MMU Illegal Operation Error           (unemulated) */
          4, /* 58: MMU Access Level Violation Error      (unemulated) */
          4, /* 59: RESERVED                                           */
          4, /* 60: RESERVED                                           */
          4, /* 61: RESERVED                                           */
          4, /* 62: RESERVED                                           */
          4, /* 63: RESERVED                                           */
             /* 64-255: User Defined                                   */
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
          4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4
    }
};

const uint8 m68ki_ea_idx_cycle_table[64] =
{
     0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
     0, /* ..01.000 no memory indirect, base NULL             */
     5, /* ..01..01 memory indirect,    base NULL, outer NULL */
     7, /* ..01..10 memory indirect,    base NULL, outer 16   */
     7, /* ..01..11 memory indirect,    base NULL, outer 32   */
     0,  5,  7,  7,  0,  5,  7,  7,  0,  5,  7,  7,
     2, /* ..10.000 no memory indirect, base 16               */
     7, /* ..10..01 memory indirect,    base 16,   outer NULL */
     9, /* ..10..10 memory indirect,    base 16,   outer 16   */
     9, /* ..10..11 memory indirect,    base 16,   outer 32   */
     0,  7,  9,  9,  0,  7,  9,  9,  0,  7,  9,  9,
     6, /* ..11.000 no memory indirect, base 32               */
    11, /* ..11..01 memory indirect,    base 32,   outer NULL */
    13, /* ..11..10 memory indirect,    base 32,   outer 16   */
    13, /* ..11..11 memory indirect,    base 32,   outer 32   */
     0, 11, 13, 13,  0, 11, 13, 13,  0, 11, 13, 13
};



/* ======================================================================== */
/* =============================== CALLBACKS ============================== */
/* ======================================================================== */

/* Default callbacks used if the callback hasn't been set yet, or if the
 * callback is set to NULL
 */

/* Interrupt acknowledge */
static int default_int_ack_callback_data;
static int default_int_ack_callback(int int_level)
{
    default_int_ack_callback_data = int_level;
    CPU_INT_LEVEL = 0;
    return M68K_INT_ACK_AUTOVECTOR;
}

/* Breakpoint acknowledge */
static unsigned int default_bkpt_ack_callback_data;
static void default_bkpt_ack_callback(unsigned int data)
{
    default_bkpt_ack_callback_data = data;
}

/* Called when a reset instruction is executed */
static void default_reset_instr_callback(void)
{
}

/* Called when a cmpi.l #v, dn instruction is executed */
static void default_cmpild_instr_callback(unsigned int val, int reg)
{
    (void)val;
    (void)reg;
}

/* Called when a rte instruction is executed */
static void default_rte_instr_callback(void)
{
}

/* Called when a tas instruction is executed */
static int default_tas_instr_callback(void)
{
    return 1; // allow writeback
}

/* Called when an illegal instruction is encountered */
static int default_illg_instr_callback(int opcode)
{
    (void)opcode;
    return 0; // not handled : exception will occur
}

/* Called when the program counter changed by a large value */
static unsigned int default_pc_changed_callback_data;
static void default_pc_changed_callback(unsigned int new_pc)
{
    default_pc_changed_callback_data = new_pc;
}

/* Called every time there's bus activity (read/write to/from memory */
static unsigned int default_set_fc_callback_data;
static void default_set_fc_callback(unsigned int new_fc)
{
    default_set_fc_callback_data = new_fc;
}

/* Called every instruction cycle prior to execution */
static void default_instr_hook_callback(unsigned int pc)
{
    (void)pc;
}


#if M68K_EMULATE_ADDRESS_ERROR
    #include <setjmp.h>
    #ifdef _BSD_SETJMP_H
    sigjmp_buf m68ki_aerr_trap;
    #else
    jmp_buf m68ki_aerr_trap;
    #endif
#endif /* M68K_EMULATE_ADDRESS_ERROR */

/* ======================================================================== */
/* ================================= API ================================== */
/* ======================================================================== */

/* Access the internals of the CPU */
unsigned int m68k_get_reg(void* context, m68k_register_t regnum)
{
    m68ki_cpu_core* cpu = context != NULL ?(m68ki_cpu_core*)context : &m68ki_cpu;

    switch(regnum)
    {
        case M68K_REG_D0:   return cpu->dar[0];
        case M68K_REG_D1:   return cpu->dar[1];
        case M68K_REG_D2:   return cpu->dar[2];
        case M68K_REG_D3:   return cpu->dar[3];
        case M68K_REG_D4:   return cpu->dar[4];
        case M68K_REG_D5:   return cpu->dar[5];
        case M68K_REG_D6:   return cpu->dar[6];
        case M68K_REG_D7:   return cpu->dar[7];
        case M68K_REG_A0:   return cpu->dar[8];
        case M68K_REG_A1:   return cpu->dar[9];
        case M68K_REG_A2:   return cpu->dar[10];
        case M68K_REG_A3:   return cpu->dar[11];
        case M68K_REG_A4:   return cpu->dar[12];
        case M68K_REG_A5:   return cpu->dar[13];
        case M68K_REG_A6:   return cpu->dar[14];
        case M68K_REG_A7:   return cpu->dar[15];
        case M68K_REG_PC:   return MASK_OUT_ABOVE_32(cpu->pc);
        case M68K_REG_SR:   return  cpu->t1_flag                        |
                                    cpu->t0_flag                        |
                                    (cpu->s_flag << 11)                 |
                                    (cpu->m_flag << 11)                 |
                                    cpu->int_mask                       |
                                    ((cpu->x_flag & XFLAG_SET) >> 4)    |
                                    ((cpu->n_flag & NFLAG_SET) >> 4)    |
                                    ((!cpu->not_z_flag) << 2)           |
                                    ((cpu->v_flag & VFLAG_SET) >> 6)    |
                                    ((cpu->c_flag & CFLAG_SET) >> 8);
        case M68K_REG_SP:   return cpu->dar[15];
        case M68K_REG_USP:  return cpu->s_flag ? cpu->sp[0] : cpu->dar[15];
        case M68K_REG_ISP:  return cpu->s_flag && !cpu->m_flag ? cpu->dar[15] : cpu->sp[4];
        case M68K_REG_MSP:  return cpu->s_flag && cpu->m_flag ? cpu->dar[15] : cpu->sp[6];
        case M68K_REG_SFC:  return cpu->sfc;
        case M68K_REG_DFC:  return cpu->dfc;
        case M68K_REG_VBR:  return cpu->vbr;
        case M68K_REG_CACR: return cpu->cacr;
        case M68K_REG_CAAR: return cpu->caar;
        case M68K_REG_PREF_ADDR:    return cpu->pref_addr;
        case M68K_REG_PREF_DATA:    return cpu->pref_data;
        case M68K_REG_PPC:  return MASK_OUT_ABOVE_32(cpu->ppc);
        case M68K_REG_IR:   return cpu->ir;
        case M68K_REG_CPU_TYPE:
            switch(cpu->cpu_type)
            {
                case CPU_TYPE_000:      return (unsigned int)M68K_CPU_TYPE_68000;
                case CPU_TYPE_010:      return (unsigned int)M68K_CPU_TYPE_68010;
                case CPU_TYPE_EC020:    return (unsigned int)M68K_CPU_TYPE_68EC020;
                case CPU_TYPE_020:      return (unsigned int)M68K_CPU_TYPE_68020;
                case CPU_TYPE_040:      return (unsigned int)M68K_CPU_TYPE_68040;
            }
            return M68K_CPU_TYPE_INVALID;
        default:            return 0;
    }
    return 0;
}

void m68k_set_reg(m68k_register_t regnum, unsigned int value)
{
    switch(regnum)
    {
        case M68K_REG_D0:   REG_D[0] = MASK_OUT_ABOVE_32(value); return;
        case M68K_REG_D1:   REG_D[1] = MASK_OUT_ABOVE_32(value); return;
        case M68K_REG_D2:   REG_D[2] = MASK_OUT_ABOVE_32(value); return;
        case M68K_REG_D3:   REG_D[3] = MASK_OUT_ABOVE_32(value); return;
        case M68K_REG_D4:   REG_D[4] = MASK_OUT_ABOVE_32(value); return;
        case M68K_REG_D5:   REG_D[5] = MASK_OUT_ABOVE_32(value); return;
        case M68K_REG_D6:   REG_D[6] = MASK_OUT_ABOVE_32(value); return;
        case M68K_REG_D7:   REG_D[7] = MASK_OUT_ABOVE_32(value); return;
        case M68K_REG_A0:   REG_A[0] = MASK_OUT_ABOVE_32(value); return;
        case M68K_REG_A1:   REG_A[1] = MASK_OUT_ABOVE_32(value); return;
        case M68K_REG_A2:   REG_A[2] = MASK_OUT_ABOVE_32(value); return;
        case M68K_REG_A3:   REG_A[3] = MASK_OUT_ABOVE_32(value); return;
        case M68K_REG_A4:   REG_A[4] = MASK_OUT_ABOVE_32(value); return;
        case M68K_REG_A5:   REG_A[5] = MASK_OUT_ABOVE_32(value); return;
        case M68K_REG_A6:   REG_A[6] = MASK_OUT_ABOVE_32(value); return;
        case M68K_REG_A7:   REG_A[7] = MASK_OUT_ABOVE_32(value); return;
        case M68K_REG_PC:   m68ki_jump(MASK_OUT_ABOVE_32(value)); return;
        case M68K_REG_SR:   m68ki_set_sr_noint_nosp(value); return;
        case M68K_REG_SP:   REG_SP = MASK_OUT_ABOVE_32(value); return;
        case M68K_REG_USP:  if(FLAG_S)
                                REG_USP = MASK_OUT_ABOVE_32(value);
                            else
                                REG_SP = MASK_OUT_ABOVE_32(value);
                            return;
        case M68K_REG_ISP:  if(FLAG_S && !FLAG_M)
                                REG_SP = MASK_OUT_ABOVE_32(value);
                            else
                                REG_ISP = MASK_OUT_ABOVE_32(value);
                            return;
        case M68K_REG_MSP:  if(FLAG_S && FLAG_M)
                                REG_SP = MASK_OUT_ABOVE_32(value);
                            else
                                REG_MSP = MASK_OUT_ABOVE_32(value);
                            return;
        case M68K_REG_VBR:  REG_VBR = MASK_OUT_ABOVE_32(value); return;
        case M68K_REG_SFC:  REG_SFC = value & 7; return;
        case M68K_REG_DFC:  REG_DFC = value & 7; return;
        case M68K_REG_CACR: REG_CACR = MASK_OUT_ABOVE_32(value); return;
        case M68K_REG_CAAR: REG_CAAR = MASK_OUT_ABOVE_32(value); return;
        case M68K_REG_PPC:  REG_PPC = MASK_OUT_ABOVE_32(value); return;
        case M68K_REG_IR:   REG_IR = MASK_OUT_ABOVE_16(value); return;
        case M68K_REG_CPU_TYPE: m68k_set_cpu_type(value); return;
        default:            return;
    }
}

/* Set the callbacks */
void m68k_set_int_ack_callback(int  (*callback)(int int_level))
{
    CALLBACK_INT_ACK = callback ? callback : default_int_ack_callback;
}

void m68k_set_bkpt_ack_callback(void  (*callback)(unsigned int data))
{
    CALLBACK_BKPT_ACK = callback ? callback : default_bkpt_ack_callback;
}

void m68k_set_reset_instr_callback(void  (*callback)(void))
{
    CALLBACK_RESET_INSTR = callback ? callback : default_reset_instr_callback;
}

void m68k_set_cmpild_instr_callback(void  (*callback)(unsigned int, int))
{
    CALLBACK_CMPILD_INSTR = callback ? callback : default_cmpild_instr_callback;
}

void m68k_set_rte_instr_callback(void  (*callback)(void))
{
    CALLBACK_RTE_INSTR = callback ? callback : default_rte_instr_callback;
}

void m68k_set_tas_instr_callback(int  (*callback)(void))
{
    CALLBACK_TAS_INSTR = callback ? callback : default_tas_instr_callback;
}

void m68k_set_illg_instr_callback(int  (*callback)(int))
{
    CALLBACK_ILLG_INSTR = callback ? callback : default_illg_instr_callback;
}

void m68k_set_pc_changed_callback(void  (*callback)(unsigned int new_pc))
{
    CALLBACK_PC_CHANGED = callback ? callback : default_pc_changed_callback;
}

void m68k_set_fc_callback(void  (*callback)(unsigned int new_fc))
{
    CALLBACK_SET_FC = callback ? callback : default_set_fc_callback;
}

void m68k_set_instr_hook_callback(void  (*callback)(unsigned int pc))
{
    CALLBACK_INSTR_HOOK = callback ? callback : default_instr_hook_callback;
}

/* Set the CPU type. */
void m68k_set_cpu_type(unsigned int cpu_type)
{
    switch(cpu_type)
    {
        case M68K_CPU_TYPE_68000:
            CPU_TYPE         = CPU_TYPE_000;
            CPU_ADDRESS_MASK = 0x00ffffff;
            CPU_SR_MASK      = 0xa71f; /* T1 -- S  -- -- I2 I1 I0 -- -- -- X  N  Z  V  C  */
            CYC_INSTRUCTION  = m68ki_cycles[0];
            CYC_EXCEPTION    = m68ki_exception_cycle_table[0];
            CYC_BCC_NOTAKE_B = -2;
            CYC_BCC_NOTAKE_W = 2;
            CYC_DBCC_F_NOEXP = -2;
            CYC_DBCC_F_EXP   = 2;
            CYC_SCC_R_TRUE   = 2;
            CYC_MOVEM_W      = 2;
            CYC_MOVEM_L      = 3;
            CYC_SHIFT        = 1;
            CYC_RESET        = 132;
            HAS_PMMU     = 0;
            return;
        case M68K_CPU_TYPE_SCC68070:
            m68k_set_cpu_type(M68K_CPU_TYPE_68010);
            CPU_ADDRESS_MASK = 0xffffffff;
            CPU_TYPE         = CPU_TYPE_SCC070;
            return;
        case M68K_CPU_TYPE_68010:
            CPU_TYPE         = CPU_TYPE_010;
            CPU_ADDRESS_MASK = 0x00ffffff;
            CPU_SR_MASK      = 0xa71f; /* T1 -- S  -- -- I2 I1 I0 -- -- -- X  N  Z  V  C  */
            CYC_INSTRUCTION  = m68ki_cycles[1];
            CYC_EXCEPTION    = m68ki_exception_cycle_table[1];
            CYC_BCC_NOTAKE_B = -4;
            CYC_BCC_NOTAKE_W = 0;
            CYC_DBCC_F_NOEXP = 0;
            CYC_DBCC_F_EXP   = 6;
            CYC_SCC_R_TRUE   = 0;
            CYC_MOVEM_W      = 2;
            CYC_MOVEM_L      = 3;
            CYC_SHIFT        = 1;
            CYC_RESET        = 130;
            HAS_PMMU     = 0;
            return;
        case M68K_CPU_TYPE_68EC020:
            CPU_TYPE         = CPU_TYPE_EC020;
            CPU_ADDRESS_MASK = 0x00ffffff;
            CPU_SR_MASK      = 0xf71f; /* T1 T0 S  M  -- I2 I1 I0 -- -- -- X  N  Z  V  C  */
            CYC_INSTRUCTION  = m68ki_cycles[2];
            CYC_EXCEPTION    = m68ki_exception_cycle_table[2];
            CYC_BCC_NOTAKE_B = -2;
            CYC_BCC_NOTAKE_W = 0;
            CYC_DBCC_F_NOEXP = 0;
            CYC_DBCC_F_EXP   = 4;
            CYC_SCC_R_TRUE   = 0;
            CYC_MOVEM_W      = 2;
            CYC_MOVEM_L      = 2;
            CYC_SHIFT        = 0;
            CYC_RESET        = 518;
            HAS_PMMU     = 0;
            return;
        case M68K_CPU_TYPE_68020:
            CPU_TYPE         = CPU_TYPE_020;
            CPU_ADDRESS_MASK = 0xffffffff;
            CPU_SR_MASK      = 0xf71f; /* T1 T0 S  M  -- I2 I1 I0 -- -- -- X  N  Z  V  C  */
            CYC_INSTRUCTION  = m68ki_cycles[2];
            CYC_EXCEPTION    = m68ki_exception_cycle_table[2];
            CYC_BCC_NOTAKE_B = -2;
            CYC_BCC_NOTAKE_W = 0;
            CYC_DBCC_F_NOEXP = 0;
            CYC_DBCC_F_EXP   = 4;
            CYC_SCC_R_TRUE   = 0;
            CYC_MOVEM_W      = 2;
            CYC_MOVEM_L      = 2;
            CYC_SHIFT        = 0;
            CYC_RESET        = 518;
            HAS_PMMU     = 0;
            return;
        case M68K_CPU_TYPE_68030:
            CPU_TYPE         = CPU_TYPE_030;
            CPU_ADDRESS_MASK = 0xffffffff;
            CPU_SR_MASK      = 0xf71f; /* T1 T0 S  M  -- I2 I1 I0 -- -- -- X  N  Z  V  C  */
            CYC_INSTRUCTION  = m68ki_cycles[3];
            CYC_EXCEPTION    = m68ki_exception_cycle_table[3];
            CYC_BCC_NOTAKE_B = -2;
            CYC_BCC_NOTAKE_W = 0;
            CYC_DBCC_F_NOEXP = 0;
            CYC_DBCC_F_EXP   = 4;
            CYC_SCC_R_TRUE   = 0;
            CYC_MOVEM_W      = 2;
            CYC_MOVEM_L      = 2;
            CYC_SHIFT        = 0;
            CYC_RESET        = 518;
            HAS_PMMU           = 1;
            return;
        case M68K_CPU_TYPE_68EC030:
            CPU_TYPE         = CPU_TYPE_EC030;
            CPU_ADDRESS_MASK = 0xffffffff;
            CPU_SR_MASK          = 0xf71f; /* T1 T0 S  M  -- I2 I1 I0 -- -- -- X  N  Z  V  C  */
            CYC_INSTRUCTION  = m68ki_cycles[3];
            CYC_EXCEPTION    = m68ki_exception_cycle_table[3];
            CYC_BCC_NOTAKE_B = -2;
            CYC_BCC_NOTAKE_W = 0;
            CYC_DBCC_F_NOEXP = 0;
            CYC_DBCC_F_EXP   = 4;
            CYC_SCC_R_TRUE   = 0;
            CYC_MOVEM_W      = 2;
            CYC_MOVEM_L      = 2;
            CYC_SHIFT        = 0;
            CYC_RESET        = 518;
            HAS_PMMU           = 0;     /* EC030 lacks the PMMU and is effectively a die-shrink 68020 */
            return;
        case M68K_CPU_TYPE_68040:       // TODO: these values are not correct
            CPU_TYPE         = CPU_TYPE_040;
            CPU_ADDRESS_MASK = 0xffffffff;
            CPU_SR_MASK      = 0xf71f; /* T1 T0 S  M  -- I2 I1 I0 -- -- -- X  N  Z  V  C  */
            CYC_INSTRUCTION  = m68ki_cycles[4];
            CYC_EXCEPTION    = m68ki_exception_cycle_table[4];
            CYC_BCC_NOTAKE_B = -2;
            CYC_BCC_NOTAKE_W = 0;
            CYC_DBCC_F_NOEXP = 0;
            CYC_DBCC_F_EXP   = 4;
            CYC_SCC_R_TRUE   = 0;
            CYC_MOVEM_W      = 2;
            CYC_MOVEM_L      = 2;
            CYC_SHIFT        = 0;
            CYC_RESET        = 518;
            HAS_PMMU     = 1;
            return;
        case M68K_CPU_TYPE_68EC040: // Just a 68040 without pmmu apparently...
            CPU_TYPE         = CPU_TYPE_EC040;
            CPU_ADDRESS_MASK = 0xffffffff;
            CPU_SR_MASK      = 0xf71f; /* T1 T0 S  M  -- I2 I1 I0 -- -- -- X  N  Z  V  C  */
            CYC_INSTRUCTION  = m68ki_cycles[4];
            CYC_EXCEPTION    = m68ki_exception_cycle_table[4];
            CYC_BCC_NOTAKE_B = -2;
            CYC_BCC_NOTAKE_W = 0;
            CYC_DBCC_F_NOEXP = 0;
            CYC_DBCC_F_EXP   = 4;
            CYC_SCC_R_TRUE   = 0;
            CYC_MOVEM_W      = 2;
            CYC_MOVEM_L      = 2;
            CYC_SHIFT        = 0;
            CYC_RESET        = 518;
            HAS_PMMU     = 0;
            return;
        case M68K_CPU_TYPE_68LC040:
            CPU_TYPE         = CPU_TYPE_LC040;
            m68ki_cpu.sr_mask          = 0xf71f; /* T1 T0 S  M  -- I2 I1 I0 -- -- -- X  N  Z  V  C  */
            m68ki_cpu.cyc_instruction  = m68ki_cycles[4];
            m68ki_cpu.cyc_exception    = m68ki_exception_cycle_table[4];
            m68ki_cpu.cyc_bcc_notake_b = -2;
            m68ki_cpu.cyc_bcc_notake_w = 0;
            m68ki_cpu.cyc_dbcc_f_noexp = 0;
            m68ki_cpu.cyc_dbcc_f_exp   = 4;
            m68ki_cpu.cyc_scc_r_true   = 0;
            m68ki_cpu.cyc_movem_w      = 2;
            m68ki_cpu.cyc_movem_l      = 2;
            m68ki_cpu.cyc_shift        = 0;
            m68ki_cpu.cyc_reset        = 518;
            HAS_PMMU           = 1;
            return;
    }
}

/* Execute some instructions until we use up num_cycles clock cycles */
/* ASG: removed per-instruction interrupt checks */
int m68k_execute(int num_cycles)
{
    /* eat up any reset cycles */
    if (RESET_CYCLES) {
        int rc = RESET_CYCLES;
        RESET_CYCLES = 0;
        num_cycles -= rc;
        if (num_cycles <= 0)
        return rc;
    }

    /* Set our pool of clock cycles available */
    SET_CYCLES(num_cycles);
    m68ki_initial_cycles = num_cycles;

    /* See if interrupts came in */
    m68ki_check_interrupts();

    /* Make sure we're not stopped */
    if(!CPU_STOPPED)
    {
        /* Return point if we had an address error */
        m68ki_set_address_error_trap(); /* auto-disable (see m68kcpu.h) */

        m68ki_check_bus_error_trap();

        /* Main loop.  Keep going until we run out of clock cycles */
        do
        {
            int i;
            /* Set tracing according to T1. (T0 is done inside instruction) */
            m68ki_trace_t1(); /* auto-disable (see m68kcpu.h) */

            /* Set the address space for reads */
            m68ki_use_data_space(); /* auto-disable (see m68kcpu.h) */

            /* Call external hook to peek at CPU */
            m68ki_instr_hook(REG_PC); /* auto-disable (see m68kcpu.h) */

            /* Record previous program counter */
            REG_PPC = REG_PC;

            /* Record previous D/A register state (in case of bus error) */
            for (i = 15; i >= 0; i--){
                REG_DA_SAVE[i] = REG_DA[i];
            }

            /* Read an instruction and call its handler */
            REG_IR = m68ki_read_imm_16();
            m68ki_instruction_jump_table[REG_IR]();
            USE_CYCLES(CYC_INSTRUCTION[REG_IR]);

            /* Trace m68k_exception, if necessary */
            m68ki_exception_if_trace(); /* auto-disable (see m68kcpu.h) */
        } while(GET_CYCLES() > 0);

        /* set previous PC to current PC for the next entry into the loop */
        REG_PPC = REG_PC;
    }
    else
        SET_CYCLES(0);

    /* return how many clocks we used */
    return m68ki_initial_cycles - GET_CYCLES();
}


int m68k_cycles_run(void)
{
    return m68ki_initial_cycles - GET_CYCLES();
}

int m68k_cycles_remaining(void)
{
    return GET_CYCLES();
}

/* Change the timeslice */
void m68k_modify_timeslice(int cycles)
{
    m68ki_initial_cycles += cycles;
    ADD_CYCLES(cycles);
}


void m68k_end_timeslice(void)
{
    m68ki_initial_cycles = GET_CYCLES();
    SET_CYCLES(0);
}


/* ASG: rewrote so that the int_level is a mask of the IPL0/IPL1/IPL2 bits */
/* KS: Modified so that IPL* bits match with mask positions in the SR
 *     and cleaned out remnants of the interrupt controller.
 */
void m68k_set_irq(unsigned int int_level)
{
    uint old_level = CPU_INT_LEVEL;
    CPU_INT_LEVEL = int_level << 8;

    /* A transition from < 7 to 7 always interrupts (NMI) */
    /* Note: Level 7 can also level trigger like a normal IRQ */
    if(old_level != 0x0700 && CPU_INT_LEVEL == 0x0700)
        m68ki_cpu.nmi_pending = TRUE;
}

void m68k_set_virq(unsigned int level, unsigned int active)
{
    uint state = m68ki_cpu.virq_state;
    uint blevel;

    if(active)
        state |= 1 << level;
    else
        state &= ~(1 << level);
    m68ki_cpu.virq_state = state;

    for(blevel = 7; blevel > 0; blevel--)
        if(state & (1 << blevel))
            break;
    m68k_set_irq(blevel);
}

unsigned int m68k_get_virq(unsigned int level)
{
    return (m68ki_cpu.virq_state & (1 << level)) ? 1 : 0;
}

void m68k_init(void)
{
    static uint emulation_initialized = 0;

    /* The first call to this function initializes the opcode handler jump table */
    if(!emulation_initialized)
        {
        m68ki_build_opcode_table();
        emulation_initialized = 1;
    }

    m68k_set_int_ack_callback(NULL);
    m68k_set_bkpt_ack_callback(NULL);
    m68k_set_reset_instr_callback(NULL);
    m68k_set_cmpild_instr_callback(NULL);
    m68k_set_rte_instr_callback(NULL);
    m68k_set_tas_instr_callback(NULL);
    m68k_set_illg_instr_callback(NULL);
    m68k_set_pc_changed_callback(NULL);
    m68k_set_fc_callback(NULL);
    m68k_set_instr_hook_callback(NULL);
}

/* Trigger a Bus Error exception */
void m68k_pulse_bus_error(void)
{
    m68ki_exception_bus_error();
}

/* Pulse the RESET line on the CPU */
void m68k_pulse_reset(void)
{
    /* Disable the PMMU on reset */
    m68ki_cpu.pmmu_enabled = 0;

    /* Clear all stop levels and eat up all remaining cycles */
    CPU_STOPPED = 0;
    SET_CYCLES(0);

    CPU_RUN_MODE = RUN_MODE_BERR_AERR_RESET;
    CPU_INSTR_MODE = INSTRUCTION_YES;

    /* Turn off tracing */
    FLAG_T1 = FLAG_T0 = 0;
    m68ki_clear_trace();
    /* Interrupt mask to level 7 */
    FLAG_INT_MASK = 0x0700;
    CPU_INT_LEVEL = 0;
    m68ki_cpu.virq_state = 0;
    /* Reset VBR */
    REG_VBR = 0;
    /* Go to supervisor mode */
    m68ki_set_sm_flag(SFLAG_SET | MFLAG_CLEAR);

    /* Invalidate the prefetch queue */
#if M68K_EMULATE_PREFETCH
    /* Set to arbitrary number since our first fetch is from 0 */
    CPU_PREF_ADDR = 0x1000;
#endif /* M68K_EMULATE_PREFETCH */

    /* Read the initial stack pointer and program counter */
    m68ki_jump(0);
    REG_SP = m68ki_read_imm_32();
    REG_PC = m68ki_read_imm_32();
    m68ki_jump(REG_PC);

    CPU_RUN_MODE = RUN_MODE_NORMAL;

    RESET_CYCLES = CYC_EXCEPTION[EXCEPTION_RESET];
}

/* Pulse the HALT line on the CPU */
void m68k_pulse_halt(void)
{
    CPU_STOPPED |= STOP_LEVEL_HALT;
}

/* Get and set the current CPU context */
/* This is to allow for multiple CPUs */
unsigned int m68k_context_size(void)
{
    return sizeof(m68ki_cpu_core);
}

unsigned int m68k_get_context(void* dst)
{
    if(dst) *(m68ki_cpu_core*)dst = m68ki_cpu;
    return sizeof(m68ki_cpu_core);
}

void m68k_set_context(void* src)
{
    if(src) m68ki_cpu = *(m68ki_cpu_core*)src;
}

/* ======================================================================== */
/* ============================== MAME STUFF ============================== */
/* ======================================================================== */

#if M68K_COMPILE_FOR_MAME == OPT_ON

static struct {
    UINT16 sr;
    UINT8 stopped;
    UINT8 halted;
} m68k_substate;

static void m68k_prepare_substate(void)
{
    m68k_substate.sr = m68ki_get_sr();
    m68k_substate.stopped = (CPU_STOPPED & STOP_LEVEL_STOP) != 0;
    m68k_substate.halted  = (CPU_STOPPED & STOP_LEVEL_HALT) != 0;
}

static void m68k_post_load(void)
{
    m68ki_set_sr_noint_nosp(m68k_substate.sr);
    CPU_STOPPED = m68k_substate.stopped ? STOP_LEVEL_STOP : 0
                | m68k_substate.halted  ? STOP_LEVEL_HALT : 0;
    m68ki_jump(REG_PC);
}

void m68k_state_register(const char *type, int index)
{
    /* Note, D covers A because the dar array is common, REG_A=REG_D+8 */
    state_save_register_item_array(type, index, REG_D);
    state_save_register_item(type, index, REG_PPC);
    state_save_register_item(type, index, REG_PC);
    state_save_register_item(type, index, REG_USP);
    state_save_register_item(type, index, REG_ISP);
    state_save_register_item(type, index, REG_MSP);
    state_save_register_item(type, index, REG_VBR);
    state_save_register_item(type, index, REG_SFC);
    state_save_register_item(type, index, REG_DFC);
    state_save_register_item(type, index, REG_CACR);
    state_save_register_item(type, index, REG_CAAR);
    state_save_register_item(type, index, m68k_substate.sr);
    state_save_register_item(type, index, CPU_INT_LEVEL);
    state_save_register_item(type, index, m68k_substate.stopped);
    state_save_register_item(type, index, m68k_substate.halted);
    state_save_register_item(type, index, CPU_PREF_ADDR);
    state_save_register_item(type, index, CPU_PREF_DATA);
    state_save_register_func_presave(m68k_prepare_substate);
    state_save_register_func_postload(m68k_post_load);
}

#endif /* M68K_COMPILE_FOR_MAME */

/* ======================================================================== */
/* ============================== END OF FILE ============================= */
/* ======================================================================== */
